post_install()
{
  echo "Remember to set QT_QPA_PLATFORMTHEME:"
  echo "  $ export QT_QPA_PLATFORMTHEME=gtk2"
  echo "... or to make this selectable with qt5ct:"
  echo "  $ export QT_QPA_PLATFORMTHEME=qt5ct"
  echo "and ensure that QT_STYLE_OVERRIDE is not set:"
  echo "  $ unexport QT_STYLE_OVERRIDE"
}